JP2003254328A - Roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve burning-resistance of abutment parts between inside surfaces 11a and 11a of flange parts 8a and 10a facing outside and inside and axial directional end surface of each roller 5a, and to improve axial load ability in these abutment parts. <P>SOLUTION: A part of axial directional both end surfaces of each roller 5a to be engaged with the inside surfaces 11a and 11a of the flange parts 8a and 10a facing outside and inside is formed into conical projecting surfaces 22 and 22 inclined in a direction, in which outside diameter is formed larger, as close as it comes toward a central part in the axial direction of the roller 5a. A normal related to a base line in the center points S and S of each conical projecting surface 22 and 22 existing in both ends of the roller 5a passes the center O of the roller 5a. As a result, a moment for inclining the roller 5a is eliminated by the force to be applied to the abutment parts between the conical projecting surfaces of the roller 5a and the inside surfaces 11a and 11a of the flange parts 8a and 10a facing outside and inside. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a roller bearing,
Rotary shafts of various industrial machines such as rolling mills, railway cars and construction
At the time of use, such as the rotating shaft of a gear transmission device incorporated in a machine, etc.
Rotation that applies not only radial load but also axial load
The shaft is rotatably supported on a fixed part such as a housing.
Used for In particular, the present invention has a
Load, vibration load, impact load, fluctuating load, etc.
To realize roller bearings with sufficient seizure resistance
It is intended. [0002] A support shaft fixed to the end of a roll for a rolling mill
And the gear transmission device for driving railway vehicles
The rotating shaft with the fixed helical gears has a radial load
An axial load is applied in addition to the weight. Therefore, these times
Rolling for rotatably supporting the rotating shaft with respect to the housing
Bearings support not only radial loads but also axial loads.
It must be acceptable. For this reason,
Specifically, the rotation axis is set at a contact angle with respect to the housing.
At least one pair of tapered rollers in different directions
Bearing, or angular type ball bearing, deep groove type ball bearing, three points
Or by using a four-point contact ball bearing, etc.
The bearing was supported by a cylindrical roller bearing. However, the above-mentioned angular type ball bearing and deep groove
The above-mentioned rotary shaft by using a three-point or four-point contact type ball bearing
When supporting bearings, compared to the above tapered roller bearings
Possible radial load is small. Because of this, a large radial
To support the load, combine with the cylindrical roller bearing as described above.
It is necessary to support it together, and the size of the rotation support part increases
Things are inevitable. On the other hand, the above tapered roller bearing
When supporting the rotating shaft, the gap between the tapered roller bearing
Time adjustment is very troublesome. In particular, the housing part
Temperature changes due to seasonal changes, and peripheral equipment
It changes greatly due to the influence of heat. Such a large temperature
Regardless of the degree of change, the tapered roller bearings
To avoid rattling, use this cone
It is necessary to strictly adjust the internal clearance of the filter bearing.
It is upside down. In addition, such tapered roller bearings have the above-mentioned structure.
Radial load that can be supported is smaller than cylindrical roller bearings
In addition, the large diameter end face of the tapered roller engages with this end face.
Slippage at the contact part with the side of the collar is not increased
Not. Such a large slip at the contact part is caused by
As well as increasing wear, sliding scratches, smearing,
In such a case, damage such as galling and seizure is likely to occur.
In addition, the wear of each of the above surfaces due to such slippage is caused by the internal clearance.
To increase the distance, for example, a drive device for railway vehicles
In the case of tapered roller bearings that perform
It is necessary to perform it periodically, and from this aspect also adjust the internal clearance
Is troublesome. In contrast, N-type and NU-type cylindrical
In the case of roller bearings, the larger
It can support a radial load, but only such a cylindrical roller bearing
Cannot support the load in the axial direction. Because of this
Do not use in combination with tapered roller bearings, ball bearings, etc.
To avoid the increase in the size of the rotating support part.
I can't. [0005] In order to eliminate such inconvenience, conventionally,
Rolling bearing for supporting the rotating shaft in the housing
As described in Patent Documents 1 to 3 and Non-Patent Documents 1 and 2, for example.
A collar as shown in FIG.
Use of cylindrical roller bearings with bearing rings
Have been. As described above, N-type and NU-type cylindrical roller bearings
In some cases, radial loads can be
Although the weight cannot be supported, the roller bearing 1 shown in FIG.
Are the axial end faces of the cylindrical rollers 5 as rolling elements and the inner and outer races.
Inner side surfaces 11 of flanges 8 and 10 provided at ends of peripheral surfaces of two and three,
11 to support the axial load based on the engagement with
I am here. That is, such a roller bearing 1 comprises an inner ring 2 and
Outer ring 3, collar ring 4, a plurality of cylindrical rollers 5, cage 6
And The inner ring 2 is a circle in the middle of the outer peripheral surface.
Cylindrical inner raceway 7 is also provided with outward flanges 8, 8 at both ends.
Are provided respectively. Further, the outer ring 3 is provided on the inner peripheral surface.
Except for one end (right end in FIG. 13), a cylindrical outer ring gauge
Road 9 and inward flange 10 at one end
Provided. Further, the collar ring 4 is provided in the axial direction of the outer ring 3 and the like.
It is provided in a state where it abuts against the end face (left end face in FIG. 13).
And a portion closer to the inner diameter than the outer ring raceway 9 in the diameter direction.
The part projecting inward is the inward flange 10. or,
The plurality of cylindrical rollers 5 are held by the holder 6.
Between the inner raceway 7 and the outer raceway 9
It is provided movably. [0007] The roller bearing 1 constructed as described above is provided with the above-mentioned circles.
The two axial end surfaces of the cylindrical roller 5 are connected to the pair of outward flange portions 8, 8.
And the pair of inward flanges 10 and 10 respectively.
Between each of these cylindrical rollers 5 and each of these flanges 8, 10.
To support the axial load in both directions. Immediately
That is, the above-described rotary shaft is provided by the roller bearing 1 configured as described above.
If this is rotatably supported with respect to the housing,
The axial load applied to the rolling shaft is transmitted through the roller bearing 1
Can be supported by the above housing. Roller bearing like this
1 can be used with a larger roller than the tapered roller bearing described above.
In addition to supporting the radial load, the rotary shaft and housing
Adjustment of the internal clearance when assembling between
You. [Patent Document 1] Japanese Patent Application Laid-Open No. 8-93756 [Patent Document 2] Japanese Patent Application Laid-Open No. 9-88970 [Patent Document 3] Japanese Patent Application Laid-Open No. 2001-151103 [Non-Patent Document 1] Published by NSK Ltd. "NSK rolling is
Bearing General Catalog No. 140c, 1995
Row, p. B81 [Non-Patent Document 2] "Total Rolling Bearings" issued by NTN Corporation
Catalog No. 2202- (2) / J, 1997
Published in September, p. B-92 Problems to be Solved by the Invention
When an axial load is supported by the roller bearing 1,
The axial load is applied to both end faces of the cylindrical roller 5 and any
An engaging portion (sliding contact) with which the facing flange portion 8 and the inward facing flange portion 10 abut.
(Touch) will be supported only. Therefore, this engagement portion
Provides high-speed sliding contact while supporting large axial loads
And the product of the contact pressure (P) and the sliding speed (V)
A certain PV value increases. Therefore, especially large Axia
When supporting an axial load or when this axial load
Heavy or impact load, and severe lubrication conditions
(For example, when operating in a micro lubrication state).
Damage such as galling and seizure may occur
You. An axial load is applied to the roller bearing 1.
In other words, based on this axial load, each of the above cylindrical rollers
5, the rotation center axis of each of these cylindrical rollers 5 is to be inclined.
Force, a so-called tilt moment. That is,
For example, an axial load Fa is applied as shown in FIG.
And the forces indicated by arrows α and α in the figure
5 at the opposite axial end faces of these cylindrical rollers 5 in the radial direction.
To the opposite parts. Such reverse force
Are also the cylindrical rollers described above, as indicated by the arrow β in FIG.
The force (tilt moment) that tilts the rotation center axis of 5
And joins each of these cylindrical rollers 5. Of course, this figure 1
Axial load in the opposite direction to axial load Fa shown in 3
Is added to the cylindrical rollers 5, the tilt motor
Is added in the opposite direction (counterclockwise) to the above-mentioned arrow β.
You. Such a tilt moment causes the above-mentioned cylindrical rollers 5 to move.
Tilt (incline) the outside of the end face of each of these cylindrical rollers 5
The periphery is the inner surface 11, 11 of each of the upward and downward flanges 8, 10.
Or the inner ring raceway 7 and the outer ring raceway 9. This result
As a result, the inner surfaces 11, 11 of these flanges 8, 10 and both tracks
Edge load is generated on the 7th and 9th surfaces, and the durability of each surface
It may reduce the performance. Further, in the case of a structure provided with a retainer,
The following problems also occur. That is, the axial direction of each of the cylindrical rollers 5
The outer peripheral edges of both ends are relatively sharp (formed at almost right angles).
), A cage for holding each of the above cylindrical rollers 5
The shape of the pockets 12 provided in 6 is shown in FIG.
Thus, the corner has a square shape. Therefore, each of the above cylinders
The rolling surface of the roller 5 and the inner surfaces of the pockets 12 and 12
When abutting, the stress applied to the above corner is likely to increase
And it may be difficult to ensure the durability of the cage 6.
There is a potential. The roller bearing of the present invention solves such disadvantages.
It was invented to erase it. [0012] A roller bearing according to the present invention has an external bearing.
An inner ring with a cylindrical inner raceway on the peripheral surface and a cylinder on the inner peripheral surface
Outer race having an outer raceway of the shape, and the outer raceway and the inner raceway
A plurality of rollers that can be rolled between the road and
Of both ends in the axial direction of the outer raceway and the inner raceway
In other words, at least the outer ring raceway and the inner ring raceway
With flanges provided at the opposite ends.
I can. Then, the side surface of each flange and the axial direction of each roller
Axial load can be freely supported based on engagement with the end face
And In particular, in the roller bearing of the present invention,
The outer diameter of each roller is a cylindrical surface, and the outer diameter of both end surfaces in the axial direction.
The part that engages with the side of each of the flanges on the side
Inclined in the direction of increasing outer diameter toward the center in the axial direction
It has a conical convex surface. In addition, along with this,
The part of the surface that engages with the conical convex surface
Conical convex surface having a bus line with the same inclination angle as the convex bus line
Or it is a conical concave surface. Furthermore, both ends of the above roller
Of the above-mentioned conical convex surfaces existing in the
Any part on the generatrix of the part engaging with the convex or conical concave surface
The line connecting the point and the center of the above roller is expressed as the modulus of the bus at that point.
Lines are matched. It is to be noted that any of the engagement portions on the bus
The point exists at an intermediate portion of the generatrix of this portion. This place
The intermediate portion in this case is the
Intermediate part, especially limited to the center of the bus in that part
Not included (of course, including the central part, but very close to both ends)
Including the part that does). In short, at any point in the middle
Should pass through the center of the roller. Conversely
If this is the case, draw a perpendicular from this center to the generatrix
Just do it. Also, the bus bar of the above-mentioned engaging portion is in contact with each other.
The conical convex surfaces present at both ends of the above rollers
And the bus bar of the conical convex or concave surface of the flange
Of these, the portions that overlap each other. In the case of the roller bearing of the present invention as described above, the roller
The contact state between the axial end face of the
And a state close to rolling contact (rolling component rather than sliding component)
Is large). Because of this, high speed rotation
Even if it is slippery, smearing, galling or burning
Damage, etc., so that impact loads, vibration loads,
Easy to secure seizure resistance even when repeated loads are applied
I can do it. Further, the conical convex surface on each roller side and
An engaging portion that comes into contact with the conical convex surface or the conical concave surface on the flange portion side
Has a force based on the axial load and the radial load,
It is applied in the normal direction of this engaging portion. And each of these engagements
The force applied in the normal direction of the part
Work toward each other and cancel each other out. That is, at this time
Of the conical convex surfaces present at both ends,
On the generatrix of the engaging part where the convex or conical concave surface comes into contact
A line connecting any of the points and the center of the roller at the point
The above axial load
And the force based on the radial load is directed toward the center of each roller above.
Act and cancel each other out. Therefore, each of these
The force for displacing the filter hardly acts. For example, the tilt motor added to each of these rollers
Also reduced (to almost 0)
The rotation centers of these rollers are not aligned with the center axes of the inner and outer rings.
And the inner ring raceway and the outer ring
Edge load is less likely to occur on the wheel track. As a result,
Axial load capacity at the engagement section
Larger axes without causing damage such as
Capacity to support the aluminum load) and other
To eliminate the need to use in combination with rolling bearings
The size and simplification of the rotation support part by this
Cost can be reduced by simplification. 1 to 4 show an embodiment of the present invention.
1 shows a first example. The feature of this example is that
Both end faces in the axial direction of the filter 5a and outward and inward flanges 8a, 10a
The point lies in that the shape of the inner side surfaces 11a, 11a of a is devised.
The structure and operation of the other parts are shown in FIG.
Since it is the same as the roller bearing 1, the same reference numerals are used for the same parts.
The duplicate description is omitted or simplified to
The description focuses on the features of the example. In the case of the roller bearing 1a of this embodiment, each of the above rollers 5
a, inner ring 2, outer ring 3, and collar ring 4
Inner surface 1 of each of the outward and inward flange portions 8a, 10a
As shown in detail in FIG.
The outer diameter increases toward the center of the roller 5a in the axial direction.
Conical convex surfaces 22 are inclined in the direction. still,
Such a conical convex surface 22 is a spherical convex surface.
It can be manufactured at low cost as compared with the case of On the other hand, each of the above
Of the inner side surfaces 11a, 11a of the outward flanges 8a, 8a,
At least the conical convex surfaces 22, 22 of the respective rollers 5a are engaged.
As shown in detail in FIG.
A cone having a bus line having the same inclination angle as the bus lines 2 and 22
It has a convex surface. FIG. 3 shows only the inner ring 2.
However, as shown in FIG. 1, the inward direction of the outer ring 3 and the collar ring 4
Of the inner side surfaces 11a, 11a of the flanges 10a, 10a,
At least the conical convex surfaces 22, 22 of the respective rollers 5a are engaged.
The mating portions are the same as the outward flanges 8a, 8a of the inner ring 2.
As described above, the same inclination angle as the generatrix of the conical convex surfaces 22 and 22 is used.
And a conical concave surface having a generatrix. Further, in the case of this embodiment, as shown in FIG.
Each of the conical convex surfaces present at both ends of the roller 5a
Out of 22, 22, the outward and inward flanges 8a, 10a
a bus bar of the engaging portion abutting on the conical convex surface or the conical concave surface of a
A connecting the center point S of the roller 5a with the center O of the roller 5a
With the normal of the generatrix at each of these center points S, S
I have. At the same time, as shown in FIGS. 1 and 3,
Conical convex surfaces or circles of the outward and inward flanges 8a, 10a
Of the concave surface of the cone, it exists on both ends of the roller 5a.
The center of the generatrix of the portion engaging with each of the conical convex surfaces 22, 22
The line A connecting the points S, S and the center O of the roller 5a is also
The normal of the generatrix at this portion is matched. Therefore,
The conical convex surfaces 22, 22 of each roller 5a and the outward and inward
Engagement of the flanges 8a, 10a with the conical convex surface or the conical concave surface
Based on axial and radial loads applied to parts
The force is applied to the inside of the roller 5a as shown by the arrow F in FIG.
Join toward the heart O. As described above, in the case of the roller bearing 1a of this embodiment,
Are conical convex surfaces 22, 22 on both axial end surfaces of each roller 5a.
And the outward and inward flanges 8a, 10a
Axial direction of each roller 5a among inner side surfaces 11a, 11a
The portion that engages with each end face is defined by the conical convex faces 22, 22.
Conical convex surface or cone having a bus with the same inclination angle as the bus
It has a concave surface. For this reason, the contact state between these surfaces
Is in line contact and close to rolling contact (slip component
(A state in which the rolling component is larger than the rolling component). This
As a result, slippage at the contact points between these surfaces is reduced.
Therefore, even when rotating at high speed, slipping and smearing,
Reduces damage such as galling and seizure, and prevents impact loads and vibrations.
Seizure resistance even under dynamic and repeated loads
Can be easily secured. Further, the conical convex surfaces 22, 2 of the respective rollers 5a are provided.
2 and the above-mentioned outward and inward flanges 8a, 10a,
Is the axial load on the engaging part where the conical concave surface
And the force based on the radial load
It is added in the direction of the normal to the surface bus. And each of these engagement portions
Are applied to the center of the roller 5a.
Acts toward O and cancels each other. That is, this
Each of the conical convex surfaces 22, 22 existing at both ends of the filter 5a
Of the above, the outward and inward flanges 8a, 10a have a conical convexity.
Center point of the generatrix of the engaging part where the surface or conical concave surface contacts
A line A connecting S, S and the center O of the roller 5a is
Since the center line S is matched with the normal of the generatrix at S,
Force F based on axial load and radial load (see Fig. 2)
) Acts toward the center of each of the above rollers 5a.
Cancel each other out. For this reason, the force for displacing each of these rollers 5a
Becomes less effective. For example, each of these rollers 5a
Also significantly reduced tilt moment (almost 0).
And the center of rotation of each of these rollers 5a and the inner ring 2 and
It is difficult for the center axis of the outer ring 3 to be inconsistent with the center axis.
The inner side surfaces 11a, 11a of the
Edge load hardly occurs on the inner raceway 7 and outer raceway 9
Become. As a result, the axial load capacity at the engagement portion
(Do not cause damage such as galling or seizure at this engagement part.
Ability to support larger axial loads)
And can be used in combination with other rolling bearings.
Small and simple rotation support part
And cost reduction by this small size and simplification.
I can do it. Furthermore, the outer peripheral edges of both ends in the axial direction of each of the rollers 5a.
Is shaped by the existence of each of the conical convex surfaces 22 and 22 described above.
The rollers 5a are kept in a relatively smooth shape.
Pockets 12a, 12a provided in the retainer 6 for holding
As shown in Fig. 4, the shape is relatively smooth at the corners.
it can. For this reason, the rolling surface of each roller 5a and each pocket
When the inner surfaces of the sockets 12a, 12a collide with each other,
The stress applied to the cage 6 can be kept low, and the
It becomes easy to secure durability. FIG. 5 shows a second embodiment of the present invention.
An example is shown. In the case of this example, each roller 5a can freely roll.
The retainer 6a for holding the so-called rivet
It is a container. That is, in the embodiment shown in FIG.
In the case of the first example, the whole is cylindrical, and the
Synthetic tree in which a number of pockets 12 are formed at equal intervals in the circumferential direction
With a machined-type retainer 6 made of one piece of grease or metal
are doing. On the other hand, the retainer 6a incorporated in this example is
The whole is a comb-shaped ring also made of synthetic resin or metal
Shape, one end (right end) on the axial end (right end)
With multiple pockets at equal intervals in the circumferential direction with the
With the main body 13 formed with
Built and provided with one end of each pocket closed
And an annular member 14. And, of the main body 13
With the rivets 15 on the pillars between the pockets 12,
A shape penetrating the pillar portion and the annular member 14 in the axial direction.
The main body 13 and the ring member 14 cannot be separated from each other.
Is bound to. Other configurations and operations are the same as those of roller 5a.
Including the shape of each outward and inward flanges 8a and 10a,
This is the same as in the first example. Next, FIG. 6 shows a third embodiment of the present invention.
An example is shown. The first embodiment of the embodiment shown in FIG.
Example and the case of the second example of the embodiment shown in FIG.
Provided a collar ring 4 at one axial end (left end) of the outer ring 3.
Although the present invention is applied to the NP type roller bearing 1a,
However, in the case of this example, one end (left end) in the axial direction of the inner ring 2a.
The present invention is applied to a NUP type roller bearing 1a provided with a collar ring 4a.
Have applied. In the case of this example as well, the shaft of each roller 5a is also used.
Inner surface 1 of each outward and inward flange 8a, 10a
The portion engaging with 1a, 11a is set in the axial direction of the roller 5a.
Cone inclined in the direction of larger inner diameter toward the center
The convex surfaces 22 are provided. Also, along with this, each of these
Of the conical convex surfaces 22, 22, the cone of the outward flange 8a
Each of the center point S of the generating line of the engaging portion abutting on the convex surface and the inward direction
The center of the generatrix of the engaging portion that comes into contact with the conical concave surface of the flange portion 10a
Line A connecting the point S and the center O of the roller 5a is
Match with the normal of each bus at each center point S, S
I have. On the other hand, the outward and inward flanges 8a, 10a
Circle of each roller 5a of the inner side surfaces 11a, 11a
The part that engages with the conical convex surface 22
A cone having a bus line having the same inclination angle as the bus lines 22 and 22
Convex surface (in case of inner side surface 11a of outward flange 8a) or cone
Concave surface (in the case of the inner surface 11a of the inward flange 10a)
You. Further, in the case of this example, each of the rollers 5a can be rolled freely.
The retainer 6b to be held is formed by pressing a metal plate.
It is a so-called press-type retainer. Hold this
The vessel 6b has one end (left end) in the axial direction radially outward.
The other axial end (right end) inward in the radial direction
It is bent. Other configurations and operations are described above.
This is the same as the case of the first example. FIG. 7 shows a fourth embodiment of the present invention.
An example is shown. The embodiment shown in FIGS.
In the case of the first and second examples, one end in the axial direction of the outer race 3 (left end)
The present invention is applied to an NP-type roller bearing 1a provided with a collar ring 4 on its surface.
On the other hand, in the case of this example, if the collar 4 is omitted,
In both cases, one end (left end) of both ends of the outer ring 3b is
NF type roller bearing 1a provided with only inward flange 10a.
The invention has been applied. In the case of this example,
Supports only axial load. That is, the outer ring 3b
From one side (left side) to the other side (right side)
Axial load and other side of inner ring 2 (right side)
Axial load added to one (left) from the other (right)
Bearing weight. In this way, only the axial load in one direction
In the case of bearing, each outward direction provided at both ends of the inner ring 2
One (leftward) outward flange 8a of the flanges 8a, 8a
The inner surface 11a and the one end surface (left end surface) 5a in the axial direction
No axial load is applied between them. For this reason,
The inner surface 11a of the outward flange 8a is not necessarily a conical surface.
However, in the case of this example, the combination of the inner ring 2 is not necessary.
In order to eliminate the attaching direction, both of the above outward flanges 8a, 8a
The inner side surfaces 11a, 11a are formed as conical convex surfaces. Other
The configuration and operation of the roller 5a and the outward and inward flanges 8
a, same as the first example, including the shape of 10a
It is. Next, FIG. 8 shows a fifth embodiment of the present invention.
An example is shown. The fourth embodiment of the embodiment shown in FIG.
In the case of the example, one end (left end) of both ends of the outer race 3b is used.
NF type roller bearing provided with an inward flange 10a only in the
While the present invention is applied to 1a, in the case of this example,
At one end (left end) of both ends in the axial direction of the inner ring 2b,
The present invention is applied to an NJ-type roller bearing 1a provided with an outward flange 8a.
Has been applied. In the case of this example as well, each roller 5a
Outer and inward flanges 8a, 10a at both axial end faces
11a, the portion to be engaged with 11a, the axial direction of the roller 5a
A circle inclined in a direction in which the outer diameter increases toward the center
Convex surfaces 22, 22. Also, with this,
Each of the conical convex surfaces 22, 22 existing at both ends of the filter 5a
Of the outward and inward flanges 8a, 10a
Or, the center points S, S of the generatrix of the engaging portion abutting the conical concave surface.
And a line a connecting the center O of the roller 5a with the center point
It is made to coincide with the normal line of the bus at S and S portions. On the other hand, the outward and inward flanges 8a, 10a
Circle of each roller 5a of the inner side surfaces 11a, 11a
The part that engages with the conical convex surface 22
A cone having a bus line having the same inclination angle as the bus lines 22 and 22
It has a convex surface or a conical concave surface. Furthermore, in the case of this example,
The retainer 6c for rotatably holding the rollers 5a is a circle.
A pair of elements 16, 16 formed in an annular shape are connected to each of these rollers.
The connecting pin 17 provided in a state penetrating through the central axis of 5a
It is a so-called pin type retainer which is inseparably connected.
Other configurations and operations are the same as in the above-described fourth example.
It is. Next, FIG. 9 shows a sixth embodiment of the present invention.
An example is shown. The embodiment shown in FIGS.
The cases of the first to fifth examples have the cages 6, 6a, 6b, 6c.
The present invention is applied to the roller bearing 1a.
In the case of the example, the full roller bearing without cage
The present invention is applied to the receiver 1b. In the case of this example
Is to install many rollers 5a as much as there is no cage
Can be. For this reason, without increasing the size of the roller bearing 1b,
More load can be supported. Of course, like this
Also in the case of this example, outward and inward at both axial end surfaces of each roller 5a.
Engage with inner side surfaces 11a, 11a of each flange 8a, 10a.
The outer diameter of the portion increases toward the center in the axial direction of the roller 5a.
Conical convex surfaces 22, 22 inclined in the direction in which
You. At the same time, it is present at both ends of the roller 5a.
Outward and inward flanges of the respective conical convex surfaces 22 and 22
Abuts on the conical convex surface or concave conical surface of the portion 8a, 10a
The center points S, S of the bus of the engagement portion and the center O of the roller 5a
And the center line S, the normal line of the generatrix at the S portion
And match. On the other hand, the outward and inward flanges 8a,
Each of the rollers 5 of the inner side surfaces 11a, 11a of 10a
a, which engages with the conical convex surfaces 22, 22.
Have the same inclination angle as the generatrix of the convex surfaces 22 and 22
Conical convex surface or conical concave surface. Other composition and
The operation is the same as in the case of the first example described above. Next, FIG. 10 shows a second embodiment of the present invention.
Seven examples are shown. Also in the case of this example, it is shown in FIG.
Similar to the sixth example of the embodiment, the full complement without the retainer
The present invention is applied to the bearing 1b. In the case of this example,
Like the fourth example of the embodiment shown in FIG.
b, an inward flange 10a is provided only at one end (left end).
NF type full roller bearings. Other configurations and functions
Is the shape of the roller 5a and the outward and inward flanges 8a and 10a.
And the same as in the above-described fourth and sixth examples.
It is like. FIG. 11 shows a second embodiment of the present invention.
Eight examples are shown. The embodiment shown in FIGS.
The first to seventh examples of the present invention are applied to single row roller bearings 1a and 1b according to the present invention.
In this example, double row roller bearings
18, the present invention is applied. That is, the cylindrical outer ring 19
Double-row outer ring raceways, each cylindrical
9, 9 are formed. Also, the inner peripheral surface of such an outer ring 19
At the central portion in the axial direction between the outer raceways 9, 9,
The direction flange 10b is formed over the entire circumference. Also outside this
Flange rings 4 and 4 are provided on both axial end surfaces of the ring 19,
Out of the rings 4, 4, in the diametric direction more than the outer ring tracks 9, 9
The portions protruding in the direction are defined as inward flanges 10a, 10a.
You. In addition, a pair of inner rings 2, 2
Are placed with their axial end faces facing each other.
ing. A circle is formed on the outer peripheral surface of each of these inner rings 2, 2.
A cylindrical inner raceway 7 is formed. Also, each of these
At the ends of the ring raceways 7, 7 on the opposite sides in the axial direction,
The outward flanges 8a, 8a are formed over the entire circumference. So
Then, each of the outer raceways 9, 9 and each of the inner raceways 7, 7,
Hold a plurality of rollers 5a, 5a between them
It is provided so as to roll freely while being held by the containers 6 and 6.
Then, in this state, both ends in the axial direction of the rollers 5a, 5a
The surfaces are respectively directed to the outward and inward flanges 8a, 10a, and 1a.
0b are opposed to the side surfaces 11a, 11a. In particular, in the case of this example, the shaft of each of the above rollers 5a
Of each of the inner rings 2, 2, the outer ring 19,
The outward and inward flanges 8a, 10a provided on the collar rings 4, 4, respectively.
a, 10b are engaged with the inner surfaces 11a, 11a,
The outer diameter increases toward the center of the roller 5a in the axial direction.
Conical convex surfaces 22 are inclined in the direction. or,
At the same time, each of the circles existing at both ends of the roller 5a
Outward and inward flange portions 8a of the conical convex surfaces 22 and 22,
Abuts on the conical convex surface or conical concave surface of 10a, 10b
The center points S, S of the bus of the engagement portion and the center O of the roller 5a
Is connected to the normal of the generatrix at the center points S, S
I let you match. On the other hand, the outward and inward flanges 8a, 10a
a of the inner surfaces 11a, 11a of the
The portion of the filter 5a that engages with the conical convex surfaces 22, 22 is
A bus having the same inclination angle as the bus of the conical convex surfaces 22, 22 is provided.
Conical convex surface or conical concave surface. In the case of this embodiment as well, the axial direction of each roller 5a is also
Of both flanges 8a, 10a, and 10b facing outward and inward.
The contact state with the side surfaces 11a, 11a is changed by line contact and rolling.
It is possible to make the state close to the glue contact. For this reason, high speed
Even if it is turned over, it may be scratched or smeared, galling, or burning
To reduce damage such as impacts, vibration loads,
Even when returning load is applied, seizure resistance can be easily secured.
Wear. The conical convex surfaces 22, 2 of the respective rollers 5a
2 and the outward and inward flanges 8a, 10a, and 10b.
Clearance added to the engaging part where the convex surface or the conical concave surface contacts
The force based on the sial load and the radial load
Acts toward the center of 5a and cancels each other. this
Therefore, the force for displacing each of the rollers 5a hardly acts.
You. As a result, the axial load capacity (
Without causing damage such as galling or seizure at the engagement part of
Ability to support larger axial loads)
And must be used in combination with other rolling bearings.
The rotation support part is small, simple,
In order to reduce the cost by this small size and simplification,
You. FIG. 12 shows a second embodiment of the present invention.
Nine examples are shown. In this example, multi-row (four-row) roller axis
The present invention is applied to the receiver 18a. That is, each is a circle
Out of a pair of outer rings 19, 19 which are cylindrical and arranged concentrically with each other
On the peripheral surface, a double row outer raceway 9, each of which is cylindrical,
9 are formed respectively. In addition, each of these outer rings 19,
At the central portion in the axial direction of the inner peripheral surface of the outer ring track 19,
Inward flanges 10b, 10b are formed around the entire circumference at the intermediate portion
are doing. Also, the axial outer end faces of the outer rings 19, 19,
And, in the portion between the axial inner end surfaces, the collar ring 4,
21 and the outer ring gauge of the collar rings 4 and 21 is provided.
The part projecting diametrically inward from the roads 9 and 9 is
The parts are 10a and 10b. Also, the outer rings 19, 1
A pair of inner rings 20, 20 are attached to the inner diameter side of
With the end faces facing each other, place them concentrically
ing. On the outer peripheral surface of each of these inner rings 20, 20,
These form a double-row inner raceway 7, 7 which is cylindrical.
You. In addition, the axial center of the outer peripheral surface of each of the inner rings 20, 20
Between the two inner ring raceways 7, 7 and in each of these
Outer flanges 8 are provided at both axial ends of the ring raceways 7, 7.
b, 8a are formed over the entire circumference. And each of the above
Between the outer raceway 9, 9 and the inner raceway 7, 7,
Each of the plurality of rollers 5a, 5a is
It is provided so that it can roll freely while holding it. And this
In this state, the axial end faces of the rollers 5a and 5a are respectively
The side of the above outward and inward flanges 8a, 8b, 10a, 10b
The surfaces 11a are opposed to each other. In the case of this embodiment having such a structure,
Each of the inner rings 20, 2 of the axial end faces of the filter 5a.
0, the outer rings 19, 19 and the outer rings provided on the respective collar rings 4, 21.
Inner surface 1 of each of the facing and inward flanges 8a, 8b, 10a, 10b
The portion engaging with 1a, 11a is set in the axial direction of the roller 5a.
Cone inclined in the direction of larger inner diameter toward the center
The convex surfaces 22 are provided. Also, at the same time,
Of each of the above-mentioned conical convex surfaces 22, 22 existing at both ends of 5a.
Outward and inward flanges 8a, 8b, 10a, 10b
Bus of the engaging part where the conical convex surface or the conical concave surface of
A connecting the center point S of the roller 5a with the center O of the roller 5a
With the normals of the generatrix at the center points S, S
You. On the other hand, the outward and inward flanges 8a, 8b, 10a,
Each of the above rollers 5 of the inner side surfaces 11a, 11a of 10b.
a, which engages with the conical convex surfaces 22, 22.
Have the same inclination angle as the generatrix of the convex surfaces 22 and 22
Conical convex surface or conical concave surface. Other composition and
The operation is the same as in the case of the eighth example described above. As described above, the roller bearing according to the present invention has the following features.
To be configured and act, the axial end face on the side of the flange
The contact state of the engaging part with which it comes into contact is close to the rolling contact state.
Thus, the seizure resistance of the engagement portion can be improved. In addition,
Improved seizure resistance based on reduced tilt moment
And the axial load capacity at the engagement part is sufficiently improved.
I can make it. In the case of a structure using a cage
In addition, the durability (breakage strength) of this cage can be improved.
You. As a result, various types of rotating supports operated under severe conditions
To ensure the durability of the rotating support.
First, the size can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view showing a first example of an embodiment of the present invention. FIG. 2 is an enlarged view of a roller. FIG. 3 is an enlarged partial sectional view of an inner ring. FIG. 4 is a partial plan view of the retainer. FIG. 5 is a partial sectional view showing a second example of the embodiment of the present invention. FIG. 6 is a partial sectional view showing the third example. FIG. 7 is a partial sectional view showing the fourth example. FIG. 8 is a partial sectional view showing the fifth example. FIG. 9 is a partial sectional view showing the sixth example. FIG. 10 is a partial cross-sectional view showing the seventh example. FIG. 11 is a half sectional view showing the eighth example. FIG. 12 is a half sectional view showing the ninth example. FIG. 13 is a partial sectional view showing an example of a conventional structure of a roller bearing. FIG. 14 is a partial plan view of the retainer. DESCRIPTION OF SYMBOLS 1, 1a, 1b Roller bearings 2, 2a, 2b Inner ring 3, 3a, 3b Outer ring 4, 4a Flange ring 5, 5a (Cylinder) roller 6, 6a, 6b, 6c Cage 7 Inner ring raceway 8, 8a, 8b Outward flange portion 9 Outer ring raceway 10, 10a, 10b Inward flange portion 11, 11a Inner surface (side surface) 12, 12a Pocket 13 Body 14 Ring member 15 Rivets 16 Element 17 Connecting pin 18, 18a Multi-row roller bearing 19 Outer ring 20 Inner ring 21 Flange ring 22 Conical convex surface

Claims (1)

Claims: 1. An inner ring having a cylindrical inner raceway on an outer peripheral surface, an outer ring having a cylindrical outer raceway on an inner peripheral surface, and rolling between the outer raceway and the inner raceway. Of a plurality of freely provided rollers and axially opposite ends of the outer raceway and the inner raceway, at least end portions of the outer raceway and the inner raceway which are opposite to each other in the axial direction are provided respectively. A roller bearing that is capable of supporting an axial load based on the engagement between the side surface of each flange portion and the axial end face of each roller. And a portion that engages with the side surface of each of the flange portions near the outer diameter of both end surfaces in the axial direction, and a conical convex surface inclined in a direction in which the outer diameter increases toward the center in the axial direction of the roller, It engages with this conical convex surface on the side of the flange. The portion is a conical convex surface or a conical concave surface having a generatrix of the same inclination angle as the generatrix of the conical convex surface. A roller bearing, characterized in that a line connecting any point on the bus of the engaging portion and the center of the roller coincides with the normal of the bus at that point.