JP2011231862A - Rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing with a lubricating function capable of reducing function deterioration due to heat treatment deformation and correction cost increase.SOLUTION: A rolling element 4 is interposed between rolling surfaces 2a and 3a of an inner ring 2 and an outer ring 3. A lubricating oil supply passage 11 communicating with a bearing space from a peripheral surface opposite to the bearing space is provided to a fixed side orbital ring 3 which is not rotated in the inner ring 2 and the outer ring 3 to be orbital rings. The fixed side orbital ring 3 comprises an orbital ring body 13 having the rolling surface 3a and the lubricating oil supply passage 11 and a pair of annular side rings 14 and 15 provided in contact with both end surfaces of the orbital ring body 13. Annular elastic seals 12 are provided to peripheral surfaces opposite to the bearing space of the both side rings 14 and 15.

Description

  The present invention relates to a rolling bearing with a lubrication function used for supporting a high-speed spindle such as a main spindle of a machine tool.

As a bearing lubrication method, for example, in the cylindrical roller bearing or the angular ball bearing shown in FIG. 8 or FIG. 10, the outer ring 33 that is a stationary raceway is provided with a lubricating oil supply hole 41 that communicates with the bearing space from the outer peripheral surface. A method of supplying lubricating oil from the lubricating oil supply hole 41 into the bearing is known (for example, Patent Document 1).
Further, like the cylindrical roller bearing and the angular ball bearing shown in FIGS. 9 and 11, in addition to the lubricating oil supply hole 41 described above, the lubricating oil on the outer peripheral surface of the outer ring 33 is used for the purpose of preventing leakage of the lubricating oil. A configuration in which a pair of O-rings 42 is provided at two positions in the axial direction across the opening of the supply hole 41 is also known.
Patent Documents 2 and 3 include bearings with a raceway having a split structure.

Japanese Utility Model Publication No. 63-180726 JP-A-8-93756 JP 2009-275792 A

  The bearing outer ring is subjected to heat treatment so as to have hardness. In the case of the bearing shown in FIGS. 8 to 11, the lubricating oil supply hole 41 and the O-ring groove 33 b of the outer ring 33 are usually machined at the turning stage before heat treatment. However, the outer ring 33 in which the lubricating oil supply hole 41 and the O-ring groove 33b are processed has a large deformation due to a complicated shape, which may affect the bearing accuracy or the O-ring 42. Shimeshiro becomes uneven on the circumference.

  Therefore, it is necessary to perform a special heat treatment method for suppressing such deformation and to ensure accuracy by increasing the grinding allowance. In addition, there is a method of processing after heat treatment, but it may affect the bearing life due to the heat effect during processing, so care must be taken.

  An object of the present invention is to provide a rolling bearing with a lubrication function that can reduce functional deterioration and correction cost increase due to heat treatment deformation.

  A rolling bearing according to a first configuration of the present invention includes a rolling element interposed between the rolling surfaces of an inner ring and an outer ring, and a bearing space is provided in a non-rotating fixed-side bearing ring among the inner ring and outer ring that are race rings. In the rolling bearing provided with the lubricating oil supply path communicating with the bearing space from the peripheral surface on the opposite side, the fixed-side bearing ring has a bearing ring body having a rolling surface and the lubricating oil supply path, and the bearing ring. It consists of a pair of annular side wheels provided in contact with both end faces of the main body, and an annular elastic seal is provided on the circumferential surface on the opposite side to the bearing space of these both wheels. A circumferential groove that communicates with the lubricating oil supply path may be provided on the circumferential surface of the bearing ring body opposite to the bearing space.

  According to this configuration, the fixed-side bearing ring is composed of a bearing ring main body having a rolling surface and a lubricating oil supply path, and a pair of annular side rings provided in contact with both end faces thereof. An annular elastic seal for preventing leakage of lubricating oil is provided on the peripheral surface opposite to the space. Therefore, it is not necessary to provide a seal groove for fitting the elastic seal in the race ring main body. In addition to the rolling surface, a lubricating oil supply path is machined in the raceway ring body, but machining can be reduced to the extent that no further groove for sealing is required. For this reason, the deformation of the bearing ring main body due to the heat treatment is reduced, and the factor of deterioration of the bearing function due to processing can be eliminated. The processing cost required for deformation correction can also be reduced. In addition, the shape of the side wheel is a simple ring, and deformation due to heat treatment is small, so the groove depth of the seal fitting groove formed on the peripheral surface can maintain the accuracy during turning, and fine processing Can be easily performed. Since the side wheels do not have rolling surfaces, it is possible to use low-altitude materials and to omit heat treatment.

  The rolling bearing according to the second configuration of the present invention includes a rolling element between the rolling surfaces of the inner ring and the outer ring, and a bearing space in the fixed-side bearing ring that does not rotate among the inner ring and the outer ring that are the bearing rings. In a rolling bearing provided with a lubricating oil supply path that communicates with the bearing space from the peripheral surface on the opposite side, the fixed-side bearing ring is provided in contact with the bearing ring body having a rolling surface and the end face of the bearing ring body. It is characterized in that the lubricating oil supply passage is provided in the side wheel. A circumferential groove that communicates with the lubricating oil supply path may be provided on the peripheral surface of the side wheel opposite to the bearing space.

  According to this configuration, the fixed-side bearing ring is composed of a bearing ring body having a rolling surface and an annular side wheel provided in contact with the end face of the bearing ring body, and the bearing ring body has a lubricating oil supply path. Is not formed. For this reason, the processing of the bearing ring main body can be further reduced, the deformation of the bearing ring main body due to the heat treatment is further reduced, and the factor of deterioration of the bearing function due to the processing can be sufficiently eliminated. The processing cost required for deformation correction can also be reduced. Lubricating oil supply passages are formed on the side wheels, but the shape of the side wheels is a simple annular shape, deformation due to heat treatment is small and does not affect the bearing function, and fine processing can be easily performed. it can. Since the side wheels do not have rolling surfaces, it is possible to use low-altitude materials and to omit heat treatment.

In the present invention, the lubricating oil supply path may be a hole penetrating the side wheel, or may be a notch formed on an end surface of the side wheel contacting the end surface of the race ring main body.
When the lubricating oil supply path is constituted by the notches, the machining cost can be reduced without causing a drill defect or an increase in the number of machining steps as in the case of drilling.

In the present invention, the fixed-side raceway includes a raceway main body having a rolling surface and a pair of annular side wheels provided in contact with both end faces of the raceway main body. One of them may be provided with the lubricating oil supply path, and an annular elastic seal may be provided at each axial position across the opening of the lubricating oil supply path on the peripheral surface opposite to the bearing space of both side wheels.
In this configuration, an annular elastic seal for preventing leakage of lubricating oil is provided on the peripheral surface opposite to the bearing space of both wheels, and the lubricating oil supply path is also provided on one side wheel. It is not necessary to provide not only the sealing groove for fitting the seal but also the lubricating oil supply path in the bearing ring body. Since only the raceway surface needs to be machined on the raceway ring body, machining on the raceway ring body can be further reduced. For this reason, the deformation of the bearing ring main body due to the heat treatment is further reduced, and the factor of deterioration of the bearing function due to processing can be eliminated. The processing cost required for deformation correction can be reduced.

In these inventions, an oil drain passage communicating with the bearing space from the circumferential surface opposite to the bearing space may be provided in the side wheel.
In rolling bearing devices where oil lubrication is performed, it is necessary to take measures to avoid heat generation due to retention of lubricating oil, but when oil drainage passages are provided on the side wheels, the lubricant oil must be discharged from these oil drainage passages to the outside. Heat generation due to retention of lubricating oil can be effectively avoided. Further, providing the oil drainage passage in the side wheel does not increase the heat treatment deformation of the bearing ring main body due to the processing of the oil drainage passage. Further, if the oil drainage path is provided at a position outside the axial direction from the position where the elastic seal is installed in the side wheel, the function of preventing the lubricating oil leakage by the elastic seal is not hindered.

In these inventions, of the inner ring and the outer ring, the rotation-side raceway is provided in contact with the raceway main body having a rolling surface and the end face of the raceway main body, and the entire width of the rotation-side raceway is set to the fixed-side raceway. It is good also as what consists of a cyclic | annular side ring arrange | equalized with the full width of a ring | wheel.
In this way, when the rotation-side bearing ring is composed of a bearing ring body having a rolling surface and a side ring, the existing bearing ring rotation-side bearing ring, which is an existing conventional product, can be used as the bearing ring body. In addition, the entire width of the rotation-side raceway can be easily aligned with the full width of the fixed-side raceway composed of the raceway main body and the side ring. That is, since the rotating bearing ring of the rolling bearing, which is an existing conventional product, can be used as a partial component of the rolling bearing device, the cost can be reduced.

  In the present invention, the side wheel may be made of a low hardness material having an HRC of 20 or less. Since the side wheels are separated from the rolling surface of the raceway ring body and do not require hardness, the use of low-hardness materials will not affect the bearing function, thereby reducing heat treatment costs. It becomes.

  In the case of each of the above-described configurations in the present invention, the fixed-side track ring may be an outer ring.

  In the case of each of the configurations of the present invention, the rolling bearing may be a ball bearing such as an angular ball bearing.

  The rolling bearing of the present invention can be suitably used for supporting a machine tool spindle that rotates at a high speed because the above-described effects can be obtained.

A rolling bearing according to a first configuration of the present invention includes a rolling element interposed between the rolling surfaces of an inner ring and an outer ring, and a bearing space is provided in a non-rotating fixed-side bearing ring among the inner ring and outer ring that are race rings. In the rolling bearing provided with the lubricating oil supply path communicating with the bearing space from the peripheral surface on the opposite side, the fixed-side bearing ring has a bearing ring body having a rolling surface and the lubricating oil supply path, and the bearing ring. It consists of a pair of annular side wheels provided in contact with both end faces of the main body, and an annular elastic seal is provided on the circumferential surface on the opposite side of the bearing space of these two side wheels, so that functional deterioration due to heat treatment deformation and correction cost increase Can be reduced.
A rolling bearing device according to a second configuration of the present invention includes a rolling element interposed between the rolling surfaces of an inner ring and an outer ring, and a bearing on a fixed-side bearing ring that does not rotate among the inner ring and the outer ring that are race rings. In a rolling bearing provided with a lubricating oil supply path that communicates with the bearing space from the circumferential surface opposite to the space, the fixed-side raceway is in contact with the raceway main body having a rolling surface and the end face of the raceway main body. Since the lubricating oil supply passage is provided in the side wheel provided, the function deterioration and the correction cost increase due to the heat treatment deformation can be reduced.

It is sectional drawing of the rolling bearing concerning 1st Embodiment of this invention. It is sectional drawing of the rolling bearing concerning other embodiment of this invention. It is sectional drawing of the rolling bearing concerning further another embodiment of this invention. It is sectional drawing of the rolling bearing concerning further another embodiment of this invention. It is sectional drawing of the rolling bearing concerning further another embodiment of this invention. It is sectional drawing of the rolling bearing concerning further another embodiment of this invention. It is sectional drawing of the main axis | shaft apparatus provided with the rolling bearing shown in FIG. It is sectional drawing of a prior art example. It is sectional drawing of another prior art example. It is sectional drawing of another prior art example. It is sectional drawing of another prior art example.

  A first embodiment of the present invention will be described with reference to FIG. The rolling bearing 1 is an angular ball bearing, and includes an inner ring 2 and an outer ring 3, and a plurality of rolling elements 4 interposed between the rolling surfaces 2 a and 3 a of the inner and outer rings 2 and 3. The rolling elements 4 are formed of balls, and each rolling element 4 is held in a pocket 5 a of a cage 5. The outer ring 3 that is a fixed-side raceway that does not rotate is provided with a lubricating oil supply path 11 that communicates with the bearing space from the outer peripheral surface, that is, the peripheral surface opposite to the bearing space.

  The outer ring 3 includes a raceway main body 13 having a rolling surface 3 a formed on the inner peripheral surface and the lubricating oil supply passage 11, and a pair of annular side wheels provided in contact with both end faces of the raceway main body 13. 14 and 15. A circumferential groove 13 a communicating with the lubricating oil supply path 11 is formed on the outer peripheral surface of the bearing ring main body 13. O-rings 12 that are annular elastic seals are provided on the outer peripheral surfaces of the side wheels 14 and 15, that is, on the peripheral surface opposite to the bearing space. In order to fit the O-ring 12, sealing grooves 14 a and 15 a are formed on the outer peripheral surfaces of the both side wheels 14 and 15. As a material of the side wheels 14 and 15, for example, a low hardness material having an HRC of 20 or less is used.

  This rolling bearing device 1 is incorporated in the inner periphery of the axle box 21. During operation, the lubricating oil supplied from the outside to the lubricating oil supply passage 25 of the axle box 21 is guided to the inside of the bearing through the lubricating oil supply passage 11 of the race ring main body 13 constituting the outer ring 3. Since the O-rings 12 are provided on the outer peripheral surfaces of the both side wheels 14 and 15 provided in contact with both end surfaces of the bearing ring main body 13, the O-rings 12 prevent the lubricating oil from leaking from the outer peripheral surface of the outer ring 3. be able to.

  Further, in the rolling bearing 1 having this configuration, the outer ring 3 has a bearing ring main body 13 having a rolling surface 3 a and a lubricating oil supply path 11, and a pair of annular rings provided in contact with both end faces of the bearing ring main body 13. Since the O-rings 12 are provided on the outer peripheral surfaces of the both-side wheels 14 and 15, respectively, no seal groove for fitting the O-ring 12 is provided in the raceway ring body 13. I'll do it. In addition to the rolling surface 3a, the raceway main body 13 is processed with the lubricating oil supply path 11 and a circumferential groove 13a communicating therewith. Can be reduced. For this reason, the deformation of the bearing ring main body 13 due to the heat treatment is reduced, and it is possible to eliminate the factor of deterioration of the bearing function due to processing. The processing cost required for deformation correction can also be reduced. Further, since the shape of the side wheels 14 and 15 is a simple annular shape and deformation due to heat treatment is small, the groove depths of the sealing grooves 14a and 15a formed on the outer peripheral surface thereof maintain the accuracy during turning. And fine processing can be easily performed.

  In this embodiment, a low hardness material of HRC 20 or less is used as the material of the side wheels 14 and 15, but the side wheels 14 and 15 are separated from the rolling surface 13 a of the bearing ring main body 13 to ensure a bearing function. Therefore, it is possible to use a low-hardness material, thereby reducing the heat treatment cost.

  FIG. 2 shows another embodiment of the present invention. In the rolling bearing 1 according to this embodiment, an outer ring 3 that is a non-rotating fixed raceway is provided with a raceway main body 13 having a rolling surface 3 a and one annular ring provided in contact with one end surface of the raceway main body 13. Side wheel 14. In this embodiment, the lubricating oil supply path 11 is provided in the side wheel 14 and is not provided in the race ring main body 13. The lubricating oil supply passage 11 of the side wheel 14 is a hole penetrating from the outer peripheral surface into the bearing space, and a circumferential groove 14 b communicating with the lubricating oil supply passage 11 is formed on the outer peripheral surface of the side wheel 14. ing. In this embodiment, an annular elastic seal that prevents the lubricating oil from leaking from the outer peripheral surface of the outer ring 3 is not provided. Other configurations are the same as those in the embodiment of FIG.

  In the case of this embodiment, only the rolling surface 3a is formed on the raceway ring main body 13 constituting one part of the outer ring 3, and the lubricating oil supply path 11 is not formed. For this reason, the processing of the bearing ring main body 13 can be further reduced, the deformation of the bearing ring main body 13 due to the heat treatment is further reduced, and the factor of deterioration of the bearing function due to the processing can be sufficiently eliminated. The processing cost required for deformation correction can also be reduced. The side wheel 14 is formed with the lubricating oil supply passage 11 and a circumferential groove 14b communicating therewith, but the shape of the side wheel 14 is a simple annular shape, and deformation due to heat treatment is small and affects the bearing function. No, fine processing can be easily performed. Other functions and effects are the same as those of the embodiment of FIG.

  FIG. 3 shows still another embodiment of the present invention. In the rolling bearing 1 of this embodiment, in the embodiment of FIG. 2, the lubricating oil supply path 11 of the side wheel 14 is formed by a notch formed in the end surface of the side wheel 14 that contacts the end surface of the raceway ring body 13. Other configurations are the same as those in the embodiment of FIG.

  As described above, when the lubricating oil supply passage 11 of the side wheel 14 is formed by forming a notch in the end surface of the side wheel 14 that is in contact with the end surface of the raceway ring main body 13, a fine drilling or an increase in processing man-hours is caused. Compared to the case where the lubricating oil supply path 11 is formed by drilling, the processing cost can be reduced. Other functions and effects are the same as those in the embodiment of FIG.

  FIG. 4 shows still another embodiment of the present invention. In the rolling bearing 1 of this embodiment, in the embodiment of FIG. 1, the lubricating oil supply path 11 is provided in the side wheel 14 and is not provided in the race ring main body 13. The lubricating oil supply passage 11 of the side wheel 14 is a hole penetrating from the outer peripheral surface into the bearing space, and a circumferential groove 14 b communicating with the lubricating oil supply passage 11 is formed on the outer peripheral surface of the side wheel 14. ing. O-rings 12 that are annular elastic seals are provided on the outer peripheral surfaces of both side wheels 14 and 15, and seal grooves 14a and 15a for fitting the O-rings 12 are formed on the outer peripheral surfaces. Other configurations are the same as those of the embodiment of FIG. The O-ring 12 of the side wheel 14 is positioned axially outside the opening of the lubricating oil supply passage 11, that is, the axial direction sandwiching the opening of the lubricating oil supply passage 11 with the O-ring 12 of the other side wheel 15. In the position.

  In the rolling bearing device 1 having this configuration, the outer ring 3 includes a raceway ring body 13 having a rolling surface 3a and a pair of annular side rings 14 and 15 provided in contact with both end faces of the raceway body 13. Thus, O-rings 12 that are annular elastic seals are provided on the outer peripheral surfaces of the both side wheels 14 and 15, respectively, and the lubricating oil supply passage 11 is also provided on one side wheel 14. Therefore, not only the sealing grooves 14 a and 15 a for fitting the O-ring 12 but also the lubricating oil supply path 11 need not be provided in the raceway ring body 13. Since it is only necessary to process the raceway surface 3a in the raceway ring body 13, the machining in the raceway ring body 13 can be further reduced. For this reason, the deformation of the bearing ring main body 13 due to the heat treatment is further reduced, and the factor of deterioration of the bearing function due to processing can be eliminated. The processing cost required for deformation correction can also be reduced. Other functions and effects are the same as those of the embodiment of FIG.

  FIG. 5 shows still another embodiment of the present invention. In the rolling bearing 1 of this embodiment, in the embodiment of FIG. 4, oil drain passages 16 communicating with the bearing space from their outer peripheral surfaces are provided on both side wheels 14 and 15, respectively. Here, each oil drainage path 16 is configured by forming a notch in the end face on the opposite side of the end face contacting the end face of the race ring main body 13 in the both side wheels 14, 15. Other configurations are the same as those in the embodiment of FIG.

  In the rolling bearing 1 in which oil lubrication is performed, it is necessary to take measures to avoid heat generation due to the retention of the lubricating oil. However, in this embodiment, the oil drain passages 16 are provided in the both side wheels 14 and 15, so The oil can be discharged from the oil discharge passage 16 to the outside, and heat generation due to the retention of the lubricating oil can be effectively avoided. Further, by providing the oil drain passages 16 on the both side wheels 14, 15, the heat treatment deformation of the bearing ring main body 13 is not increased due to the processing of the oil drain passages 16. Further, since both the oil drain passages 16 are provided at positions on the outer side in the axial direction from the positions where the O-rings 12 are installed on the both side wheels 14 and 15, the function of preventing the lubricating oil leakage by the O-rings 12 is not hindered. Other functions and effects are the same as those in the embodiment of FIG.

  FIG. 6 shows still another embodiment of the present invention. In the rolling 1 of this embodiment, in the embodiment of FIG. 5, the inner ring 2 that is the rotating side race ring is provided so that the race ring main body 17 having the rolling surface 2 a and the end face of the race ring main body 17 are in contact with each other. By configuring with the annular side wheel 18, the full width of the inner ring 2 is made equal to the full width of the outer ring 3. Other configurations are the same as those in the embodiment of FIG.

  As described above, the inner ring 2 that is the rotation side raceway is constituted by the raceway main body 17 having the rolling surface 2a and the side ring 18, so that the raceway bearing body 17 is a conventional rolling bearing that is a conventional product. An inner ring can be used, and the entire width of the inner ring 2 can be easily aligned with the entire width of the outer ring 3 composed of the raceway ring body 13 and the side rings 14 and 15. That is, since the same inner ring as the inner ring of the conventional rolling bearing can be used as a partial component of the rolling bearing 1, the cost can be reduced. Other functions and effects are the same as those of the embodiment of FIG.

  FIG. 7 shows an example of a spindle device using the rolling bearing 1 shown in FIG. This spindle device is for a machine tool. A tool or workpiece chuck (not shown) is attached to one end 20a of the spindle 20, and a drive source such as a motor is connected to a rotation transmission mechanism (the other end 20b). (Not shown). The main shaft 20 is rotatably supported by a pair of rolling bearings 1 separated in the axial direction. In the illustrated example, a pair of rolling bearings 1 are arranged in a rear combination, and the inner and outer rings 2 and 3 of each rolling bearing 1 are regulated in the axial direction by an inner ring spacer 8 and an outer ring spacer 7.

  The inner ring 2 of each rolling bearing 1 is fitted to the outer circumferential surface of the main shaft 20, and the outer ring 3 is fitted to the inner circumferential surface of the axle box 21. The inner and outer rings 2 and 3 are fixed to the main shaft 20 and the axle box 21 by an inner ring retainer 22 and an outer ring retainer 23, respectively. The axle box 21 has a double structure of an inner peripheral axle box 21a and an outer peripheral axle box 21b, and a cooling medium flow path 24 is formed between the inner and outer axle boxes 21a and 21b. The inner peripheral axle box 21a is provided with a lubricating oil supply path 25 and its supply port 25a. The supply port 25a is connected to a lubricating oil supply source (not shown). Further, the inner peripheral axle box 21a is provided with an oil drain groove 26 in the vicinity of the installation location of the rolling bearing 1 on the inner peripheral surface, and the oil drain groove 26 communicates with an oil drain path 27 opened to the outside. . The axle box 21 is installed on a support base 28 and fixed with bolts 29.

Each of the embodiments in FIGS. 1 to 6 is an example in which the stationary raceway is the outer race 3, but the stationary raceway may be the inner race 2.
Moreover, although each embodiment showed the example applied to the angular ball bearing, the same effect can be acquired even if it applies to another ball bearing or a cylindrical roller bearing.

DESCRIPTION OF SYMBOLS 1 ... Rolling bearing 2 ... Inner ring 2a ... Rolling surface 3 ... Outer ring 3a ... Rolling surface 4 ... Rolling body 11 ... Lubricating oil supply path 12 ... O-ring (elastic seal)
DESCRIPTION OF SYMBOLS 13 ... Outer ring raceway main body 13a ... Circumferential groove 14, 15 ... Outer ring side wheel 14b ... Circumferential groove 16 ... Oil drain passage 17 ... Inner ring raceway main body 18 ... Inner ring side ring

Claims (14)

A rolling element is interposed between the rolling surfaces of the inner ring and the outer ring, and among the inner ring and the outer ring, which are race rings, a non-rotating stationary race ring communicates with the bearing space from the peripheral surface opposite to the bearing space. In rolling bearings with oil supply paths,
The fixed-side bearing ring includes a bearing ring main body having a rolling surface and the lubricating oil supply path, and a pair of annular side wheels provided in contact with both end faces of the bearing ring main body. A rolling bearing characterized in that an annular elastic seal is provided on the circumferential surface opposite to the bearing space.   The rolling bearing according to claim 1, wherein a circumferential groove communicating with the lubricating oil supply path is provided on a circumferential surface of the bearing ring body opposite to the bearing space. A rolling element is interposed between the rolling surfaces of the inner ring and the outer ring, and among the inner ring and the outer ring, which are race rings, a non-rotating stationary race ring communicates with the bearing space from the peripheral surface opposite to the bearing space. In rolling bearings with oil supply paths,
The fixed-side bearing ring is composed of a bearing ring main body having a rolling surface and an annular side wheel provided in contact with an end surface of the bearing ring main body, and the lubricating oil supply path is provided in the side wheel. Rolling bearing characterized by   4. The rolling bearing according to claim 3, wherein a circumferential groove communicating with the lubricating oil supply path is provided on a peripheral surface of the side wheel opposite to the bearing space.   The rolling bearing according to claim 3 or 4, wherein the lubricating oil supply path is a hole penetrating the side wheel.   5. The rolling bearing according to claim 3, wherein the lubricating oil supply path is a notch formed on an end surface of the side wheel that is in contact with an end surface of the bearing ring main body.   7. The raceway main body according to claim 3, wherein the fixed-side raceway has a rolling surface, and a pair of annular side wheels provided in contact with both end faces of the raceway body. The lubricating oil supply passage is provided in one of these side wheels, and at the axial positions sandwiching the opening of the lubricating oil supply passage on the opposite side of the bearing space of both side wheels, respectively. Rolling bearing with an annular elastic seal.   The rolling bearing according to any one of claims 1 to 7, wherein the side wheel is provided with an oil drain passage communicating with the bearing space from a peripheral surface opposite to the bearing space.   9. The rotating side bearing ring according to any one of claims 1 to 8, wherein a rotating side race ring of the inner ring and the outer ring is provided in contact with a race ring main body having a rolling surface and an end face of the race ring main body. A rolling bearing comprising an annular side ring that aligns the full width of the raceway with the full width of the fixed side raceway.   The rolling bearing according to any one of claims 1 to 9, wherein the side wheel is made of a low hardness material having an HRC of 20 or less.   The rolling bearing according to any one of claims 1 to 10, wherein the stationary side race is an outer race.   The rolling bearing device according to any one of claims 1 to 11, wherein the rolling bearing device is a ball bearing.   The rolling bearing device according to claim 12, which is an angular ball bearing.   The rolling bearing according to any one of claims 1 to 13, which is used for supporting a machine tool main shaft.